please help, im trying to play dead rising from steam when i active the trainer everything go right but then i active anyone of the keys the game crash, i dont know if its because im trying to run it in win 8.1 or what, please heeeeeeeeeeeeelllllllppppp

The trainer version you need with the steam version won't work with windows 8.

The game developers rollbacked the latest patch. So the trainer version that works with 8 will crash the game.